Photos won't sync to devices with iPhoto enhancements like cropping
So here's what I'm doing: I'll take photos with my iPhone 4S, import to my Macbook with iPhoto, make adjustments and enhacements using iPhoto like cropping and color enhancements, then I'll add these enhanced photos to albums, then I'll try to sync the iPhoto album to my iPhone or iPad. After syncing, I can view the album photos on my devices but the photos will sometimes look like the original photo from my iPhone instead of the enhanced as it looks in iPhoto.
This only happens to some photos. And it only happens on syncing; if I set the album as an Apple TV screen saver or publish an album to Facebook through iPhoto, the photos publish fine with enhancements intact.
What's going on?